A quick update with regards to my opinion of Pacers:
I travelled on the same route as before on Wednesday 29th July and ended up on 142's each way. On the outward journey, I was surprised to see that there was a destination display inside the train (although it displayed Doncaster instead of Adwick as far as Sheffield. It then displayed Lincoln as we set off before reverting to Doncaster!). The seating arrangement was 2+3 making the isle very narrow, and the legroom was very poor.
It was only when I got off that I realised that I was on one of the dreaded ex Merseyrail units, confirmed by the electronic destination display on the rear of the train!
The return journey was a bit better as it was an ex Arriva Trains Northern unit. How do I know? It still had ATN seats! The seats were in a 2+2 layout although the legroom was still poor and some of the headrests were broken and hanging off!
We had a bit of drama between Worksop and Retford on the return journey. A few minutes away from Retford, I felt that the trains was braking. After gradually slowing down, I heard the AWS sound (I was towards the centre of the front carriage) and we came to a stop at a red signal.
I noticed a bit of activity in the cab, and the driver appeared wearing a high-viz jacket! He opened the exterior door and climbed out of the cab, closing the door behind him. I couldn't see what he was doing (Signal post telephone?), but he soon climbed back on board and entered his cab, the guard entering too.
After a very brief chat, the guard appeared and returned to his cab, and we set off slowly after a long sound of the horn. We then went over a
level crossing , (the barriers were down) sounding the horn again. The guard now apologised for the short delay and said that it was due to a signal failure. After the crossing, we accelerated once more and arrived into Retford about six minutes late.
Overall, I think the biggest problem with Pacers on that route at least is the uncomfortable seating and the lack of capacity. It wasn't quite as busy this time, but there were still a few standees. The ride quality isn't too bad on this route, and other than when navigating the point work into Sheffield, they don't squeal much either.
If they had better seating and were double up, they would be fine for that route in my opinion. That said, I would prefer a 156!